diff --git a/Address-Book/addressbook.py b/Address-Book/addressbook.py
index ce05b37019..eaca257ff7 100644
--- a/Address-Book/addressbook.py
+++ b/Address-Book/addressbook.py
@@ -20,6 +20,8 @@
 
 def create_connection(db_file):
 conn = None
+ if (db_file == ""):
+ return conn
 try:
 conn = sqlite3.connect(db_file)
 r_set = conn.execute('''SELECT * from tasks''')
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://github.com/avinashkranjan/Amazing-Python-Scripts/compare/main...harishagrawal:Amazing-Python-Scripts:main.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://github.com/avinashkranjan/Amazing-Python-Scripts/compare/main...harishagrawal:Amazing-Python-Scripts:main.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>